PL187729B1 - Apparatus for automatically limiting filling quantity of fuel, especially liquefied gas, in a tank - Google Patents

Abstract

A device for automatically limiting the filling of a tank with fuel, particularly with liquefied petroleum gas, comprising a body (1;33) provided with a duct (2;34) which can be connected to a fuel supply; a seat (5;35) which has an intake port (6) which is connected to the duct and a discharge port (11a) which is connected to the inside of the tank; a first plug element (18;41) and a second plug element (15;49) which are accommodated in the seat and are adapted to control the intake and discharge ports. Two springs (21;22) are arranged between the plug elements and the body of the device and keep the first plug element in the position for closing the intake port when the duct is not connected to the fuel supply. A cam (32;46) is operatively associated with the second plug element (15;49) and is controlled by a detector (31;48) for detecting the level of the fuel inside the tank. During filling and until the preset level is reached, the cam means keep the plug element in the position for the flow of fuel into the tank, while when the preset level is reached, the plug element is actuated into the position for closing the discharge port.

Description

The subject of the invention is a device for automatically limiting the filling of the tank with fuel, in particular liquid gas.

The current legislation on the content of liquefied gas in the tank, especially in the motor vehicle tank, prohibits filling the tank to a capacity exceeding 80% of its nominal volume. This restriction forces manufacturers of filling equipment to introduce solutions adapted to the above value.

There are known devices for filling tanks with fuel which include a body connected to a fuel supply line, but their design has many drawbacks that can lead to a complete filling of the tank, with the risk of an explosion if its volume expands due to heating. The above disadvantages are mainly due to the fact that the liquid gas filling valve of the tank can be intermediate between the closed and open positions, which allows the tank to be filled with fuel at a reduced flow rate due to a small pressure difference between the distributor and the tank, or by deliberate manual manipulation leading to reduce the flow rate.

The device for automatically limiting the filling of the tank with fuel, in particular liquid gas, according to the invention, comprising a body connected to a fuel supply line, is characterized in that the body has a formed fuel supply channel to which the seat is connected, and a control valve element is slidably mounted in the seat. of the fuel flow through the channel and an additional fuel control valve member to the tank movable with respect to the fuel flow control valve member through the channel, the valve members cooperating with the spring members

They are movable from the fuel shut-off position to the fuel open position, and one of the valve elements is mated by a cam connected to the fuel level detector.

It is preferred that the seat has an inlet in communication with the channel and an outlet in communication with the interior of the tank, and the valve member for controlling the flow of fuel to the container located in the seat is slidable coaxially with the valve member controlling the flow of fuel through the channel and movable from the closed position to the opening position of the opening. the outlet port, while the resilient members include a spring interposed between the two valve members and a spring interposed between the valve member controlling the flow of fuel to the tank and the seat abutment surface.

The valve element controlling the flow of fuel through the channel includes a movable plate in the seat, connected to the coaxial head of the valve element protruding from the face of the plate, seated in a certain section of the inlet port, and the stem extending from the opposite face of the flange, coaxial with the head of the valve element and movably movable in a blind sleeve, located in a tubular element connected to the body coaxially to the seat, and around the head of the valve element, an inlet sealing ring is placed on the plate, while the tubular element has shaped grooves and an annular shelf surrounding the outlet opening, and the sleeve has at one end a collar is formed to fit the shelf, and at the opposite end of the sleeve there is a pin, movable in the tubular element, cooperating with the cam, there is a tubular space between the sleeve and the tubular element, while the sleeve has a movable spring between the sleeve a and the plate pin and a second spring movable between the sleeve and the tubular member, the second spring having a spring rate lower than the first spring.

A second spring is located in the tubular space between the flange of the valve member and the tubular member.

It is preferred that the cam comprises a cylindrical element rotatably supported in the tubular element about an axis perpendicular to the axis of the sleeve shank, the cylindrical element being rigidly connected to the rod to which the float is attached, and the cam being rotatably movable between a first angular position in which it abuts. therein the bushing mandrel and the valve member flange remote from the shelf and the outlet opening is closed, and a second angular position in which the pin is spaced from the cam, the outlet opening being closed by the valve member flange.

It is advantageous when a cylindrical part is connected to the body, in which a fuel flow aperture is formed, connecting the seat with the interior of the tank, and valve elements movably and rotatably movable in the seat are located in the seat, and the angular position control unit of the valve element is connected to one valve element. and the second valve member is movably supported on the cylindrical portion and coaxial with the first valve member, a fuel level detector cooperating with the first valve member, the position of which depends on the height of the fuel level inside the tank, and is positioned between the first valve member and the cylindrical portion. a spring and a second spring interacting with the second valve member, the first valve member being connected to the fuel level detector.

The fuel level detector includes a rod rotatably and slidably seated in a cylindrical portion, its end being disposed in the seat and rotatably connected to the valve member, and a radial arm extending at the opposite end thereof.

The valve element has a pin that acts as a stop, which fits into a recess in the wall of the seat.

The wall has a shaped annular groove coaxial with the rod of the fuel level detector, the groove housing a sealing ring closing the space with the fuel flow opening, and the valve member having a face fitted to the sealing ring.

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It is preferred that the recess in the wall forms the fuel flow opening.

The advantage of the solution according to the invention is simple structure, reliable in operation and versatile use.

The subject of the invention is illustrated in the drawing in which fig. 1 shows the first embodiment of the device according to the invention in a partial section, fig. 2 - section at the place marked II-II in fig. 1, fig. 3 - second embodiment of the device in section, fig. 4 shows the device of fig. 3 in a different operative position.

As shown in Fig. 1, the device comprises a body 1, in which a channel 2 is formed, provided with a fitting enabling connection with a fuel (e.g. liquefied gas) dosing opening when filling the tank. The coupling has a closing valve 3 controlling the connection between the filling opening and the reservoir.

The body 1 has a shank 4 which protrudes into the tank, a cylindrical seat 5 is made connected to the channel 2 through a channel forming a circular opening 6 hereinafter referred to as the inlet opening. A valve element 18 for controlling the flow of fuel through the conduit 2 and an additional valve element 15 for controlling the fuel to the tank are slidably mounted in the seat 5.

A tubular element 7 is screwed into the seat 5 and extends through it. In the bottom 8 of the tubular element 7 there is an opening 9, coaxial with the inlet opening 6. A groove 10 is disposed in the side wall of the tubular element 7, near the bottom 8 which is connected to the interior of the tank.

The inner diameter of the tubular element 7 is smaller than the seat 5, so that its upper edge forms an annular plate 11 surrounding the outlet 11a.

The pin 12 is guided in the bore 9 and a blind bushing 13 is permanently connected to the top of the pin. The bushing 13, coaxially located inside the tubular element 7, forms with it a tubular space 14 that connects the seat 5 with the groove 10 through the inlet opening 11a. The sleeve 13 has a valve member flange 15 at the end opposite spindle 12, the inner diameter of which is smaller than the outer diameter of seat 5, as a result of which a gap is formed between the peripheral edge of the valve member flange 15 and the inner wall of seat 5. The flange of the valve member 15 is shaped to abut against the annular ledge 11 as it acts as the valve member 15 shutting off the connection between seat 5 and space 14.

In the sleeve 13 there is a slidingly movable pin 16, to the end of which opposite to the sleeve 13 a square plate 17 is rigidly connected, forming part of the valve element 18 controlling the flow of fuel through the channel 2. The corners of the square plate 17 remain in sliding contact with the seat 5. From the plate 17 it protrudes the head, coaxial with the pin 16 and forms the valve element 18, which together with the plate 17 form an annular groove in which the sealing ring 19 is placed. The head of the valve element 18 enters the inlet opening 6 and closes it tightly, ignoring any insignificant seepage, or opens it it after making a jump of a certain length.

The sealing ring 19 abuts the shoulder 20 formed by the seat 5 with the edge of the inlet port 6, acting as a one-way valve element 18 that prevents fuel from flowing backwards from the seat 5 back into the conduit 2.

On the stem 12, between the bottom 8 of the tubular element 7 and the sleeve 13, there is a spring 21 which acts on the sleeve 13 keeping the distance between the flange of the valve element 15 and the shelf 11. An additional spring 22 is placed inside the sleeve 13 which acts on the pin 16, keeping the pressure of the ring 19 against the protrusion 20. The spring 21 is weaker than the spring 22 and its modulus of elasticity is such that the return of the ring 19 to the closed position of the inlet 6 and the lifting of the flange of the valve member 15 above the ledge 11 when the pressure in the duct 2 is equal or less than the pressure at seat 5.

When the pressure is higher, the plate 17 and the sleeve 13 compress the springs 21 and 22 and push the pin 12 through the hole 9 in the bottom 8. The protrusion of the pin 12 depends on the position of the element 23 against which the pin 12 is actuated.

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It is formed, see a cylindrical body 24 rotatably mounted in an angle bracket 25 which projects from the bottom 13 (see Fig. 2).

The angle bracket 25 has a U-shaped shape, and the pivot seats of the cylindrical element 24 are formed in the arms 26 and 27. The arms 26 and 21 are connected by a flat element 28 in which a cutout 29 is made extending in the direction of rotation of the cylindrical element 24. In the cutout 29 a rod 30 is guided, one end of which is housed in the cylinder 24. At the other end of the rod 30 a float 31 is provided to respond to the height of the fuel level inside the tank, so that variations in the fuel level cause the cylinder 24 to rotate.

The cylindrical element 24 is part of the cam 32 formed by partially milling the surface of the cylinder, the cam 32 axially extends below the base 8 as it cooperates on its outer surface with the pin 12. The cam 32 is movable between angular positions which are a function of the volume of the reservoir that must remain unfilled.

This device works as follows. When the reservoir is empty, the device takes the position shown in Fig. 1, where, under the influence of springs 21 and 22, the head of the valve member 18 closes the inlet opening 6, and the ring 19 abuts the projection 20, and the float 31, via the rod 30, holds the cam 32 in position. position based on the pin 12.

When introducing fuel, e.g. liquefied gas, into the tank, a filler opening is connected to the body 1. The pressure of the liquefied gas pushes the ring 19 away from the projection 20, moving the head of the valve member 18 in the inlet port 6 against the spring 22 feedback. in this condition, the pressure exerted by the spring 22 on the bushing 13 is ineffective since the pin 12 is prevented from protruding from the bottom 8 by abutting the cam 32.

Accordingly, the flange of the valve member 15 cannot be moved downwards to close the outlet 11a. As the head of the valve member 18 moves into a protruding position from the inlet 6, a circular opening will be formed between the head of the valve member 18 and the projection 20 through which liquefied gas will flow into the reservoir from port 6, through seat 5, tubular space 14 and port 10.

The increase in the fuel level in the tank also raises the position of the float 31 and, via the rod 30, rotates the cam 32. After the cylinder 24 has reached the desired level and the corresponding rotation has been made, the cam 32 releases the pin 12, which therefore moves down to support it. flange of the valve member 15 on the shelf 11 and interrupting the flow of liquefied gas into the reservoir through the inlet port 111, the tubular space 14 and the port 10.

The volume of fuel entering the tank is accurately determined by the angular position occupied by the cam 32 and cannot be changed by adjusting the filling pressure or the action of the filler.

When the fuel level in the tank reaches a predetermined value and the pin 12 ceases to abut against the cam 32, a further supply of fuel under reduced pressure due to the greater stiffness of spring 22 relative to spring 21 will close the outlet 11 before the head of the valve member 18 exits the opening 6 thus preventing fuel from entering the tank.

Numerous changes can be made to this device. Namely, the return spring 21 of the sleeve 13, instead of being positioned between the bottom 8 and the bottom of the sleeve 13, can be placed in the tubular space 14 and can operate between the bottom 8 and the flange of the valve member 15.

Another embodiment of the device which is technically equivalent to that shown in Figs. 1 and 2 is shown in Figs. 3 and 4 in two different operating positions.

In Figures 3 and 4, reference number 33 indicates the body of a device used for a tank containing fuel, in particular liquefied gas.

A channel 34 is formed in the body 33 leading to a cylindrical seat 35, the axis of symmetry of which is marked A. Channel 34 is provided with a connector enabling connection.

187 729 fuel metering hole (e.g. liquefied gas) when filling the tank. The coupler has a valve (not shown) to close the connection between the fill port and the reservoir.

The cylindrical portion 36 is associated with the body 33 and will be hereinafter referred to as the pin for convenience of description. This pin closes the seat 35 with one of its faces 37.

An annular groove coaxial with the axis A is provided in the face 37 for a sealing ring 38 made of rubber or the like, which, when inserted into the groove, projects from the face 37.

The axial opening 39 leads to the area delimited by the ring 38 and forms a passage connecting the seat 35 to the annular chamber 40 formed in the pin coaxial with the axis A.

In the seat 35 there is a cylindrical body constituting the valve element 41 regulating the flow of fuel through the opening 39.

The valve member 41 is fixedly connected to the rod 42 while being free to rotate, the rod 42 passes through this member 41 and is rotatably supported in the opening 43 of the body 33 and in the opening 44 extending through the cylindrical portion 36 along the axis A.

From the face 45 of the valve element 41, a pin 46 protrudes towards the face 37 of the cylindrical part 36. Its distance from the axis A is equal to the distance of the through hole 39, and its diameter allows connection with this bore when the valve element 41 takes a certain angular position with respect to the part. cylindrical 36, which corresponds to the maximum amount of fuel introduced into the tank.

The amount of fuel in the tank is detected by a level transducer which consists of a rod 42, an arm 41 radially extending from the rod 42, and a fuel level detector 48 responsive to the height of the fuel level inside the tank.

Superimposed on the cylindrical portion 36 is a sliding cap of valve member 49 having a bottom 50 through which the rod 42 passes and a cylindrical wall 51 which is guided on the cylindrical portion 36. The cap forms a second valve member 49 controlling the outlet of the opening 39. The bottom 50 of the cap forms together with on the underside 52 of the cylindrical part 36 a compensation chamber 53 which is permanently connected to the chamber 40 through an opening 54 in the bottom 52.

On the rod 42 on the outer side of the bottom 50 there is a ring 55 fastened by a grub screw 56, which forms an abutment surface for a spring 57 pressing the cap of the valve element 49 in a position where it rests against the flange 58 to form an internal closure of the chamber 40, and thus through hole 39.

The described device is completed by a second spring 59, the modulus of elasticity of which is lower than that of the spring 57, and which is partially housed in the recess 60 of the cylindrical portion 36 and partially housed in the recess 61 of the valve member 41.

The device described works as follows. When the tank is empty, the device is in the position shown in Fig. 3 where, under the action of springs 57 and 58, the cap of the valve member 49 closes the chamber 40, and the second valve member 41 is pressed against the face 37. As the float of the fuel level detector 48 maintains the valve member 41 via the arm 41 and the rod 42 in an angular position such that the pin of the valve member 41 abuts the face 37, the passage 34 is connected to the opening 39 via the seat 35. Fuel, e.g. liquefied gas, is introduced into the tank by connecting the inlet opening to the body 33. The pressure of the liquefied gas causes the valve element cap 49 to move away from contact with the collar 58 against the force of the spring 57. After the valve element cap 49 is moved to open chamber 40 outward, the liquid gas flows from the opening 34 into the tank via seat 35, through hole 39 and chamber 40.

As the fuel level in the tank increases, the float of the fuel level detector 48 also rises and rotates the valve member 41 via the arm and rod 47, 42. When a predetermined level has been reached and valve member 41 has made the appropriate rotation, the pin 46 under the action of a spring 57 engages opening 39 so that valve member 41 rests on seal ring 38 and closes opening 39, thereby interrupting the flow of liquid gas into the reservoir through opening 39 and chamber 40.

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It should be noted that the volume of fuel introduced into the tank is precisely determined by the angular position occupied by the valve member 41 and cannot be changed by adjusting the filling pressure or manipulating the filler.

When the fuel level in the tank reaches a predetermined value, whereby the pin 46 and the opening 39 are joined, the further supply of fuel under reduced pressure has no effect on the closed position of the valve member 41, because the valve member 41 remains under the pressure of the spring 57 which is stronger than the spring. 59 and under the pressure of the supplied fuel.

In the device shown in Figs. 3 and 4, the pin 46, instead of engaging a through hole 39, can also engage a blind hole made in the end face.

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What

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Publishing Department of the UP RP. Mintage 50 copies. Price PLN 4.00.

Claims (10)

Patent claims A device for automatically limiting the filling of the tank with fuel, in particular liquid gas, comprising a body connected to a fuel supply line, characterized in that the body (1, 33) has a shaped fuel supply channel (2, 34) to which the socket (5, 5) is connected. 35), wherein the seat (5, 35) is slidably mounted on a valve member (18, 41) for controlling the flow of fuel through the channel (2) and an additional valve member (15, 49) for controlling the fuel to the tank, movable with respect to the control valve member ( 18, 41) of the fuel flow through the channel (2), the valve means (15, 49, 18, 41) cooperating with the elastic elements and movable from the fuel supply shut-off position to the fuel opening position, and with one of the valve elements (15). , 49, 18, 41) cooperates with a cam (32, 46) connected to the fuel level detector (31, 48). 2. The device according to claim A device as claimed in claim 1, characterized in that the seat (5) has an inlet (5) connected to the channel (2) and an outlet (11a) connected to the interior of the tank, and a valve (15) for controlling the flow of fuel to the tank located in the seat (5) is sliding coaxially with respect to the valve member (18) controlling the flow of fuel through the duct (2) and movable from the closed position to the opening position of the outlet opening (11a), while the elastic members include a spring (22) interposed between the two valve members (15, 18) and a spring (21) disposed between the valve member (15) controlling the flow of fuel to the tank and the abutment surface of the seat (5). 3. The device according to claim The valve as claimed in claim 2, characterized in that the valve member (18) which controls the flow of fuel through the channel (2) comprises a plate (17) movable in the seat (5) connected to the coaxial head of the valve member (18) protruding from the face of the plate (17). seated in a certain section of the inlet opening (6) and the stem (16) protruding from the opposite face of the plate (17), coaxial with the head of the valve element (18) and movably sliding in a blind bushing (13) located in the tubular element ( 7), connected to the body (1) coaxially to the seat (5), and around the head of the valve element (18), a sealing ring (19) of the inlet opening (6) is placed on the plate (17), while the tubular element (7) has shaped grooves (10) and an annular shelf (11) surrounding the outlet opening (11a), the sleeve (13) has a formed flange (15) at one end to fit the shelf (11), and a pin at the opposite end of the sleeve (13) (12), sliding in the tubular element (7), cooperating with a cam (32), there is a tubular space (14) between the sleeve (13) and the tubular element (17), and a spring (22) that is movable between the sleeve (13) and the pin (16) in the sleeve (13) plates (17) and a second spring (21) movable between the sleeve (13) and the tubular element (7), the second spring (21) having a lower spring rate than the first spring (22). 4. The device according to claim A device as claimed in claim 3, characterized in that the second spring (21) is positioned in the tubular space (14) between the flange of the valve member (15) and the tubular member (7). 5. The device according to claim 1 A device according to claim 3, characterized in that the cam (32) comprises a cylindrical element (24) rotatably supported in the tubular element (7) about an axis perpendicular to the axis of the shaft (12) of the sleeve (13), the cylindrical element (24) being rigidly connected to the rod. (30) to which the float (31) is attached, and the cam (32) is pivotally movable between a first angular position where the spindle (12) of the sleeve (13) rests thereon and the flange of the valve member (15) is spaced apart from the shelf (11) and the outlet (11a) is closed, and a second angular position in which the pin (12) is spaced at a distance 187 729 at a distance from the cam (32), the outlet opening (11a) being closed by the flange of the valve member (15). 6. The device according to claim 1 A cylinder as claimed in claim 1, characterized in that a cylindrical part (36) is connected to the body (33) in which a fuel flow hole (39) is formed connecting the seat (35) with the interior of the tank, valve means (41) being arranged in the seat (35). 49) slidably and rotatably movable in the seat (35), and one valve member (49) is connected to an angular position control unit of the valve member (49), and the other valve member (41) is movably supported on the cylindrical portion (36), and coaxially with the first valve member, wherein a fuel level detector (48) cooperates with the first valve member (41), the position of which depends on the height of the fuel level inside the tank, and between the first valve member (41) and the cylindrical portion (36) a spring (59) and a second spring (57) interacting with the second valve member (49), the first valve member (41) being connected to the fuel level detector (48). The device according to claim 1 The fuel level detector as claimed in claim 6, characterized in that the fuel level detector (48) comprises a rod (42) rotatably and slidably mounted in the cylindrical portion (36), the end thereof being located in the seat (35) and pivotally connected to the valve member (41). and at the opposite end thereof is a radial arm (47). 8. The device according to claim 1 The valve as claimed in claim 7, characterized in that the valve member (41) has a pin (46) as an end stop, fitting into a recess in the wall (37) of the seat (35). 9. The device according to claim 1 8. The wall (37), characterized in that the wall (37) has a shaped annular groove coaxial with the rod (42) of the fuel level detector (48), in which a sealing ring (38) closing the space with the fuel flow opening (39) is placed in the groove, and the valve member (41) has a face mating with the sealing ring (38). 10. The device according to claim 1 The method of claim 8, characterized in that the recess in the wall (37) is a fuel flow opening (39).